Means for forming glass molds



March 8, 19381 w. v'. FISHER 2,110,360

MEANS OR FORMING GLASS MOLDS Filed Aug. 17, 1935 ventor wlLuAM MHSHERS"E C? hg/@inw Am: (ttorneg I Patented` Mar. 8, l1938 UNITED STATES PATEMEANS ros. FonMlNG GLAss Monos f William V. Fisher, Lancaster, Ohio,assignor to Anchor Hocking Glass'Corporation, Lancaster, Ohio, acorporation of Delaware` Application August 17, 1935, Serial No.v 36,706

2 Claims.

This invention relates more particularly to the construction and processof making molds for the production of hollow glass ware, such astumblers and similar vessels.'

Such molds are commonly made of cast iron in one or more parts. In theproduction of hollow glass ware it is highly important that the matrixor molding surface be very hard and susceptible of being highly polishedin orderfto avoidbleml10 ishes in the ware and loss thereof, the cost ofremoving such blemishes being prohibitive.

'Ihe object of the present invention is the provision of an improvedmeans and method whereby the molding surfaces of the mold body or partsl thereof are deeply chilled, hardened or tempered so that they willtake a high polish and provide a durable surface adapted f or theproduction of large yquantities of uniformly satisfactory ware.

Other objects will appear from the disclosure 20 herein. l

I'he invention is embodied in the example herein shown and method ofoperation set forth, the features of novelty being nally claimed.

In the accompanying drawingzj 25 Figure 1 is a vertical sectional viewshowing the means for `casting and chilling the glass mold.

Fig. 2 is a vertical section of the principal chilling device.

Fig. 3 is a top plan view of the glass mold.

Fig. 4 is a vertical section of the glass mold on the line IV-IV Fig. 3.

Fig. 5 is a plan view of the lower side oi the chilling ring.

In the views 6 designates a glass mold to be produced, said glass moldbeing commonly of cast iron containing alloyed therewith such: othermetal or metals as may be desirable and useful in obtaining suitablehardness and texture. Said mold is provided with lugs Iia threaded forattachment to its support in a machine. The larger portion of theopeningin the mold is shown as tapered internally to the external formof the tumbler to be made and the opening at the smaller end of thetaper is to receive a valve-like member (not shown) for forming thebottom of the tumbler and dislodging the molded tumbler.

Preparatory to casting the glass mold there is v constructed a shapingand chilling device of metal consisting of a laterally extended baseportion 'I to form the upper end of the glass mold and having a centralplug or projection 'I integral with' the base portion to formthe'interior wall or glass-forming surface. In addition thereto achilling ring I8 is formed of metal to rest on 56 the upper margin ofthe laterally extended base (ci. zz-m) portion 1 during the castingoperation and having a chilling eiect on said casting. Said chillingring 8 is designed to cooperate with the base 'I in forming the externalportion of the top of the glass mold including its lugs 6 and cooperateswith said base in the chilling eilect.

The base 1 and plug 'la are provided with a hole 8 axially in the plug,as shown in Fig. 1, said hole being threaded at its lower and upperends, as shown at I0 `and -II respectively. The lower thread IIlreceives a threaded nipple I2 suitably connecting it withra suitablycontrolled source of water or other cooling fluid. The upper thread IIhas connected with it a threaded nipple I8 suitably connected with apipe I4 to carry away the waste liquid. Said pipe I4 contains a valvefor controlling or varying the flow o'fthe liquid passing through thechilling device. The water employed is of room temperature.

In practice a flask is provided for casting the 20 glass-moldsubstantially as depicted in Fig. 1, d with the drag I 5,'cheek I 6 andcope I1,vit being understood, of course, that the sand is vtamped in thedrag around the base 1 and ring I8, and

y the cheek and cope applied. At I9 is the pouring gateand 20 the straingate. The pouring gate leads downward and through a groove I8 in thechilling ring I8 to the cavity formed for the reception of the molteniron.v

'I'he metal to form the mold body is preferably poured while white hot,and while the metal is being poured water is caused to ow through thehole 8 at a regular or desired speed for ten ortwelve minutes o r forsuch other period as to chill the cast metal to the desired depth, sayone fourth of an inch or more of the glass mold body and provide adeeply extended hard surface capable'of receiving a high polish.

In the chilling operation the ring I8 cooperates withithe plug 'I8L andbase 1 in conducting heat from the larger or heavier end of the castingand thereby promoting evenness of the chill throughout the inner ormolding face of the glass mold. It also may be noted that at the regionof said portion of the mold the entering water is cool and becomeswarmer as it passes upward through the orifice 8, all of which tends topromote' uniform tempering of the molding suriace of the glass moldbecause the cooling effect of the water is greater Where the heat isgreater.

'I'he forms of the parts can be changed without departing from the gistof the invention as claimed. g

What I claim is: A

1. In means for tempering the interiormolding V or o' out mem :lassmold, ma cmmng means consisting of a taperedmetallic body 4 v glass moldis'cast. said tapered body having inaround which the glass moldingsurface of the tegral therewith ya laterally extended base formn ing apattern surface for the upper rim of the. 'Y glau mold cast. saidtopexedchilling means provided with an axial perforation therethrough and meansfor conducting-under pressure and controlling the now of a coolingliquid through said tapered chilling means from itslarger end to and lthrollh its `smaller end.4

2. In meansl for tempering the interior glass l moldingwsurface of acast-metal glassmold,

chilling means consisting 'ofatapercdflnetallic member around which thesaid glass mold is cast, said tapered member having integral therewith alaterally( extended base forming a-pattern vsurface for the upper rimofthe mold cast. said` tapered member provided with an axial perforationtherethrough and means for conducting under pressurerand controlling thenow of a cooling liquid througheaid tapered member from its i larger endto and through ita smaller end,and a removable chilling ring f ormingaportionY of the molding surface cooperating with said` chilling liquidto temper the larger end of said glass mold. WILLIAM V. mm.

